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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 00:53:35 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 00:53:35 +0000 |
commit | 69c6a41ffb878ef98c9378ed4b1634a404cfaa7f (patch) | |
tree | b2a4f704565d62fbb129ab9dc3b35977c50e6e7f /src/contrib/strtonum.h | |
parent | Initial commit. (diff) | |
download | knot-upstream/2.7.6.tar.xz knot-upstream/2.7.6.zip |
Adding upstream version 2.7.6.upstream/2.7.6upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | src/contrib/strtonum.h | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/src/contrib/strtonum.h b/src/contrib/strtonum.h new file mode 100644 index 0000000..6cfe8bb --- /dev/null +++ b/src/contrib/strtonum.h @@ -0,0 +1,120 @@ +/* Copyright (C) 2018 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz> + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. +*/ + +#pragma once + +#include <assert.h> +#include <errno.h> +#include <inttypes.h> +#include <limits.h> +#include <stddef.h> +#include <stdint.h> + +#include "libknot/errcode.h" +#include "contrib/ctype.h" + +inline static int intmax_from_str(const char *src, intmax_t *dst, + intmax_t min, intmax_t max) +{ + if (!is_digit(*src) && *src != '-' && *src != '+') { + return KNOT_EINVAL; + } + + errno = 0; + char *end = NULL; + intmax_t result = strtoimax(src, &end, 10); + + if (errno == ERANGE) { + return KNOT_ERANGE; + } + + if (src == end || *end != '\0') { + return KNOT_EINVAL; + } + + if (result < min || result > max) { + return KNOT_ERANGE; + } + + *dst = result; + return KNOT_EOK; +} + +inline static int uintmax_from_str(const char *src, uintmax_t *dst, + uintmax_t min, uintmax_t max) +{ + if (!is_digit(*src) && *src != '+') { + return KNOT_EINVAL; + } + + errno = 0; + char *end = NULL; + uintmax_t result = strtoumax(src, &end, 10); + + if (errno == ERANGE) { + return KNOT_ERANGE; + } + + if (src == end || *end != '\0') { + return KNOT_EINVAL; + } + + if (result < min || result > max) { + return KNOT_ERANGE; + } + + *dst = result; + return KNOT_EOK; +} + +#define CONVERT(prefix, type, min, max, src, dst) \ +{ \ + assert(src && dst); \ + prefix##max_t value; \ + int result = prefix##max_from_str(src, &value, min, max); \ + if (result != KNOT_EOK) { \ + return result; \ + } \ + *dst = (type)value; \ + return KNOT_EOK; \ +} + +inline static int str_to_int(const char *src, int *dst, int min, int max) +{ + CONVERT(int, int, min, max, src, dst); +} + +inline static int str_to_u8(const char *src, uint8_t *dst) +{ + CONVERT(uint, uint8_t, 0, UINT8_MAX, src, dst); +} + +inline static int str_to_u16(const char *src, uint16_t *dst) +{ + CONVERT(uint, uint16_t, 0, UINT16_MAX, src, dst); +} + +inline static int str_to_u32(const char *src, uint32_t *dst) +{ + CONVERT(uint, uint32_t, 0, UINT32_MAX, src, dst); +} + +inline static int str_to_size(const char *src, size_t *dst, size_t min, size_t max) +{ + CONVERT(uint, size_t, min, max, src, dst); +} + +#undef CONVERT |